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Heart Disease Health Center

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Obese Heart Patients May Live Longer

Study Backs Up Phenomenon Known as 'Obesity Paradox'
WebMD Health News

May 18, 2009 -- Obesity is a leading cause of heart disease, but as a group, heart patients who are overweight or obese live longer than lean patients and respond better to treatment.

It's called the obesity paradox, and a new review of the research shows that it is real.

Study after study has shown that obese heart patients have better survival and have fewer strokes and heart attacks than normal-weight or underweight heart patients with the same severity of disease, says cardiologist Carl J. Lavie, MD, of the Ochsner Medical Center in New Orleans.

"Even now a lot of cardiologists haven't heard of this or don't believe it," he tells WebMD. "But it is clear that as a population, obese patients with heart disease respond well to treatment and have paradoxically better outcomes than thinner patients."

Obesity Leading Cause of Heart Death

Just to be clear, no one is saying that being overweight is good for your heart. It is not.

In fact, obesity is poised to overtake smoking as the leading cause of preventable death in the U.S., and the majority of those deaths will be directly or indirectly linked to cardiovascular disease.

More than two-thirds of adults in the U.S. are now overweight or obese. Lavie says that if the trend continues the nation may soon see a decline in life expectancy for the first time in decades.

Compared to lean people, overweight and obese people have a much higher incidence of heart attacks, strokes, and death from other cardiovascular causes.

"If we could prevent obesity or limit it, it is very clear that we could reduce heart disease and deaths from heart disease," Lavie says.

But when normal or underweight people get heart disease, the studies show that their prognosis is worse than heart patients who carry extra pounds.

Lavie's review of this phenomenon encompassed research involving hundreds of thousands of patients. The findings appear in the May issue of the Journal of the American College of Cardiology.

Searching for Clues to Obesity Paradox

So if the obesity paradox really does exist in patients with heart disease, what explains it?

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